
import 'package:flutter/material.dart';
import 'package:english_words/english_words.dart';

class FollowPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return  new RandomWords();
  }
}


class RandomWords extends StatefulWidget {
  @override
  createState() => new RandomWordsState();
}

class RandomWordsState extends State<RandomWords> {
  final _suggestions = <WordPair>[];
  final TextStyle _biggerFont = new TextStyle(fontSize: 18.0);
  final _saved = new Set<WordPair>();

  Widget _buildRow(WordPair pair){
    final alreadySaved = _saved.contains(pair);
    return new ListTile(
      title: new Text(
        pair.asPascalCase,
        style: _biggerFont,
      ),
      trailing: new Icon(
        alreadySaved ? Icons.favorite :Icons.favorite_border,
        color: alreadySaved ? Colors.red: null,
      ),
      onTap: (){
        setState((){
          if(alreadySaved){
            _saved.remove(pair);
          }else{
            _saved.add(pair);
          }
        });
      },
    );
  }

  Widget _buildSuggestions(){
    return new ListView.builder(
        padding: const EdgeInsets.all(16.0),
        itemBuilder: (context,i){
          if(i.isOdd) return new Divider();
          final index = i ~/ 2;
          if (index >= _suggestions.length) {
            _suggestions.addAll(generateWordPairs().take(10));
          }
          return _buildRow(_suggestions[index]);
        }
    );
  }

  void _pushSaved(){
     Navigator.of(context).push(
       new MaterialPageRoute(
        builder: (context){
         final tiles  = _saved.map((pair){
           return new ListTile(
             title: new Text(
               pair.asPascalCase,
               style: _biggerFont,
             ),
           );
         },
         );

         //MyPage(this.parentContext);
         final divided = ListTile.divideTiles(
           context: context,
           tiles: tiles,
         ).toList();

         return new Scaffold(
           appBar: new AppBar(
             title: new Text('Saved Suggestions'),
           ),
           body: new ListView(children: divided),
         );

       },
       ),
     );
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('Startup Name Generator'),
        actions: <Widget>[
          new IconButton(icon: new Icon(Icons.list), onPressed: _pushSaved)
        ],
        backgroundColor: Colors.white10,
      ),
      body: _buildSuggestions(),
    );
  }
}
